Unimplemented tests in ETOCommitment.js

[djudjuu]

Those tests are not being implemented.
Is this intended? If so we could leave a NOTE or so in there...

   2548  it("mixed currency with fixed slots and successful", async () => {});
   2549:      it("mixed currency and refunded");
   2550:      it("mixed currency with fixed slots and refunded");
   2551:      it("ether only and successful");
   2552:      it("euro only and successful");
   2553:      it("with min cap empty commitment");
   2675:      it("ether only and successful");
   2676:      it("euro only and successful");